History of the Computer

How the Computer Evolved 1642 Blaise Pascal – mechanical adding machine Early 1800’s Jacquard – uses punch cards to control the pattern of the weaving loom 1832 Charles Babbage - invents the Difference Engine 1890 Herman Hollerith – invents a machine using punch card to tabulate info for the Census Hollerith’s Tabulating Machine

Evolution (continued) 1910 Charles Watson Sr. – International Business Machines 1946 – Mauchly and Eckert created the ENIAC computer, first electronic computer is unveiled at U. of Pennsylvania 1970’s – Integrated circuits and silicon chips lead to smaller microprocessors                                                  

ENIAC Computer Miles of wiring 18,000 vacuum tubes Thousands of resistors and switches No monitor 3,000 blinking lights Cost $486,000 100,000 additions per second Weighed 30 tons Filled a 30x50 foot room Could be replaced today by one fingernail-size silicon chip